Locking device



FIG. 1 is a perspective view of a locking device showing my new design;

FIG. 2 is a perspective view of the locking device when withdrawing or separating the latch member from the lock body of the locking device;

FIG. 3 is a front elevational view;

FIG. 4 is a top plan view;

FIG. 5 is a left side elevational view;

FIG. 6 is a right side elevational view;

FIG. 7 is a bottom plan view; and,

FIG. 8 is a rear elevational view. 

The ornamental design for a locking device, as shown and described. 